OHIP Billing Guide🩺 ServicePublished 2026
C236

C236 OHIP Billing Code: Repeat Consultation in Ophthalmology

C236 is used by ophthalmologists for repeat consultations on a hospital in-patient, requiring a new referral. It involves reassessment of the same problem after another physician's interim care.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference48.00 CAD~3 min read

1What Is the C236 OHIP Code?

C236 refers to a repeat consultation conducted by an ophthalmologist in a non-emergency hospital in-patient setting. This code applies when the same consultant reassesses a patient regarding the same ophthalmic issue previously identified, after another physician has provided interim care. The repeat consultation must be prompted by a new written referral from a referring medical professional. These consultations are crucial for following up on complex cases like retinal diseases or post-infective reassessment, ensuring continuity and quality in patient care.

Clinicians often miss this billing opportunity by failing to document the new written referral or misunderstanding the requirements distinguishing repeat consultations from regular follow-ups. Moreover, the nuances in the required documentation can lead to misbilling and reduced fees.

2Related Codes

CodeNameFrequencyDescription
A935Special surgical consultationAs needed$194.65 fee for intricate surgical consultations requiring specialized expertise in ophthalmology.
C935Special surgical consultationAs neededA variant of A935 applicable for specific ophthalmological settings.
A231Neuro-ophthalmology consultationAs needed$155.45 fee for consultations involving neuro-ophthalmologic issues.
A235ConsultationOnce per patient consultation$86.25 fee for standard ophthalmological consultations.

3Eligibility Requirements

To bill C236 for a repeat consultation, ensure that the service is provided in a non-emergency hospital in-patient setting. Each C236 service must include a new written request from a referring physician, nurse practitioner, or dental surgeon, kept on file in the consulting physician’s medical record. Exceptions to this document retention exist in settings like hospitals where common records are maintained. If these requirements are not met, the billed amount will default to a lower assessment fee. Note that this service can also be provided virtually via video call only, billed as C236A.

4What Your Clinical Note Must Show

1Required Documentation for C236

Each repeat consultation billed under C236 must include specific documentation:

  • A new written consultation request signed by the referring physician, nurse practitioner, or dental surgeon.
  • Ensure the referral request is filed correctly in the consulting physician’s records, unless shared records are used.
  • Detailed notes on the examined issue, reflecting continuity from the patient’s previous consultations and treatments.

5Weak vs. Strong Note Examples

The strong note succeeds by clearly documenting the referrer’s details, specific clinical findings, and linking the assessment to an explicit referral, providing a comprehensive overview required for proper billing. The weak note fails due to its lack of specificity and absence of essential documentation confirmations.

Weak Note

Consulted on patient with retinal issue. Follow-up after treatment by ward team. Plan set.

Strong Note

Repeat consultation on patient John Doe for reassessment of retinal detachment diagnosed earlier during admission. Previous treatment initiated by Dr. Smith (referrer) on 10/01/2023. Written referral filed. Exam finds mild improvement; recommendations for continued therapy as documented.

  • Referring physician's details
  • Consultation date and clinical details tied to the specific referral
  • Clinical observations and advice informed by the current assessment

6Common Reasons This Code Is Missed

1
Lack of Detailed Referral Documentation
Missing or vague referral documentation can lead to the claim being adjusted to a lower assessment fee.
2
Misunderstanding Repeat Consultation Criteria
Confusion over the specifics that separate a repeat consultation from follow-ups can result in misbilling.
3
Virtual Service Billing Mistakes
Failing to note that C236 can only be billed via video for virtual services could result in denied claims if incorrectly billed for phone consultations.
Document C236 correctly — every time
Empathia's templates automatically structure your notes to capture every required element for audit-proof billing.

8Frequently Asked Questions

What is the fee for billing C236?
The flat fee for C236 is CAD 48.00.
Can C236 be billed for telephone consultations?
No, C236 can be billed virtually only if the consultation is conducted via video.
What types of cases in ophthalmology commonly require repeat consultations?
Cases like retinal diseases or post-infective reassessments often require repeat consultations.
What distinguishes a repeat ophthalmology consultation from a general assessment?
A repeat consultation specifically involves a new referral for the same ongoing ophthalmic issue after initial consultation and interim care by others.
How does a referring GP factor into billing a C236?
A new written referral from the GP or relevant practitioner is necessary for billing C236 for a repeat consultation.
In what scenario does an ophthalmologist bill a repeat consultation?
When reassessing a patient for a previously identified issue post-treatment by another physician, thus requiring a new referral.
What documentation prevents fee adjustments to a lower assessment fee?
A properly documented, new, written consultation request as per OHIP requirements protect against fee adjustments.
Disclaimer: This article is intended as a general educational resource for physicians and billing staff. It does not constitute billing advice or a definitive interpretation of the OHIP Schedule of Benefits. Always verify current billing codes, eligibility criteria, and documentation requirements directly against the official Schedule of Benefits or consult with a qualified medical billing specialist.
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